Atmospheric emissions of trace elements at three types of coal-fired power plants
I. Demir, R.E. Hughes, J.M. Lytle, K.K. Ho
1997, ACS Division of Fuel Chemistry, Preprints (42) 1101-1105
[No abstract available]...
Comagmatic A-type granophyre and rhyolite from the Alid volcanic center, eritrea, northeast Africa
J. B. Lowenstern, M.A. Clynne, T.D. Bullen
1997, Journal of Petrology (38) 1707-1721
Granophyric blocks within late-Pleistocene pyroclastic flow ejecta from the Alid volcanic center, northeast Africa, are the rapidly crystallized, intrusive equivalent of pumice from the pyroclastic flow. Phenocryst compositions and geochemical characteristics of the pumice and granophyre are virtually identical. Silicate melt inclusions and other geochemical and geological constraints reveal...
Mid-crustal flow during Tertiary extension in the Ruby Mountains core complex, Nevada
T. MacCready, A.W. Snoke, J.E. Wright, K. A. Howard
1997, Geological Society of America Bulletin (109) 1576-1594
Structural analysis and geochronologic data indicate a nearly orthogonal, late Eocene–Oligocene flow pattern in migmatitic infrastructure immediately beneath the kilometer-thick, extensional, mylonitic shear zone of the Ruby Mountains metamorphic core complex, Nevada. New U-Pb radiometric dating indicates that the development of a northward-trending lineation in the infrastructure is partly coeval...
Sources of glacial moisture in Mesoamerica
J.P. Bradbury
1997, Quaternary International (43-44) 97-110
Paleoclimatic records from Mesoamerica document the interplay between Atlantic and Pacific sources of precipitation during the last glacial stage and Holocene. Today, and throughout much of the Holocene, the entire region receives its principal moisture in the summer from an interaction of easterly trade winds with the equatorial calms. Glacial...
Analysis of environmental data with censored observations
S. Liu, J.-C. Lu, D.W. Kolpin, W.Q. Meeker
1997, Environmental Science & Technology (31) 3358-3362
The potential threats to humans and to terrestrial and aquatic ecosystems from environmental contamination could depend on the sum of the concentrations of different chemicals. However, direct summation of environmental data is not generally feasible because it is common for some chemical concentrations to be recorded as being below the...
Modelling heterogeneity in the recoveries of marked animal populations with covariates of individual animals, groups of animals or recovery time
R.M. Dorazio
1997, Environmental and Ecological Statistics (4) 235-246
A general framework is developed for modelling rates of survival and recovery of marked animal populations in terms of auxiliary information collected at the time of marking. The framework may be used to estimate differences in survival or recovery among individual animals, groups of animals, and recovery times. Analyses of...
Recognition of maximum flooding events in mixed siliciclastic-carbonate systems: Key to global chronostratigraphic correlation
E. A. Mancini, B.H. Tew
1997, Geology (25) 351-354
The maximum flooding event within a depositional sequence is an important datum for correlation because it represents a virtually synchronous horizon. This event is typically recognized by a distinctive physical surface and/or a significant change in microfossil assemblages (relative fossil abundance peaks) in...
Permeability and porosity of the Illinois UPH 3 drillhole granite and a comparison with other deep drillhole rocks
C.A. Morrow, D.A. Lockner
1997, Journal of Geophysical Research B: Solid Earth (102) 3067-3075
Permeability, porosity, and volumetric strain measurements were conducted on granite cores obtained at depths of 0.7 to 1.6 km from the Illinois UPH 3 drillhole at effective confining pressures from 5 to 100 MPa. Initial permeabilities were in the range of 10-17 to 10-19 m2 and dropped rapidly with applied...
Natural chemical attenuation of halogenated hydrocarbon compounds via dehalogenation
M. Reinhard, G.P. Curtis, Jack E. Barbash
1997, Book chapter, Subsurface restoration
No abstract available...
Oiled seabird rescue at the J.V. Fitzgerald Marine Reserve, San Mateo County, California, 1968-1995
H.R. Carter
1997, Journal of Wildlife Rehabilitation (20) 3-14
Records of oiled and injured seabirds at the J.V. Fitzgerald Marine Reserve, San Mateo County, California, were collated from the daily log at the Reserve for the period 1968-1995. These records serve to demonstrate that oil spills and chronic oiling have occurred frequently in this area, just south of San...
Three-dimensional upper crustal velocity structure beneath San Francisco Peninsula, California
T. Parsons, M.L. Zoback
1997, Journal of Geophysical Research B: Solid Earth (102) 5473-5490
This paper presents new seismic data from, and crustal models of the San Francisco Peninsula. In much of central California the San Andreas fault juxtaposes the Cretaceous granitic Salinian terrane on its west and the Late Mesozoic/Early Tertiary Franciscan Complex on its east. On San Francisco Peninsula, however, the present-day...
Accumulation and turnover of carbon in organic and mineral soils of the BOREAS northern study area
S.E. Trumbore, J.W. Harden
1997, Journal of Geophysical Research D: Atmospheres (102) 28817-28830
Rates of input, accumulation, and turnover of C differ markedly within soil profiles and in soils with different drainage in the BOREAS northern study area. Soil C storage increases from ∼3 kg C m−2 in well-drained, sandy soils to greater than 100 kg C m−2 in wetlands. Two modes of C accumulation...
Toward a comprehensive catalog of global historical seismicity
A. Villasenor, Eric A. Bergman, T.M. Boyd, E.R. Engdahl, D.W. Frazier, M.M. Harden, J.L. Orth, R.L. Parkes, K. M. Shedlock
1997, Eos, Transactions, American Geophysical Union (78) 581-582
The United States Geological Survey (USGS) and the Colorado School of Mines (CSM) have initiated a project to locate more accurately all earthquakes recorded by instruments during the period 1900 to 1963. Seismicity for this period (hereafter referred to as historical seismicity, following Lee et al. [1988])...
Use of inexpensive pressure transducers for measuring water levels in wells
B. D. Keeland, J.F. Dowd, W.S. Hardegree
1997, Wetlands Ecology and Management (5) 121-129
Frequent measurement of below ground water levels at multiple locations is an important component of many wetland ecosystem studies. These measurements, however, are usually time consuming, labor intensive, and expensive. This paper describes a water-level sensor that is inexpensive and easy to construct. The sensor is placed below the expected...
Nesting season food habits of 4 species of Herons and Egrets at Lake Okeechobee, Florida
J.P. Smith
1997, Waterbirds (20) 198-220
Based on the composition of nestling regurgitations collected during 3 breeding seasons, fish were the most important prey group for Great Egrets (Ardea alba: N = 200 nest-day samples; aggregate percent biomass [APB] = 73.4%), Snowy Egrets (Egretta thula: N = 115; APB = 91.4%), and Tricolored Herons (E. tricolor....
Epithermal mercury-antimony and gold-bearing vein lodes of southwestern Alaska
John E. Gray, Carol A. Gent, Lawrence W. Snee, Frederic H. Wilson
Richard J. Goldfarb, Lance D. Miller, editor(s)
1997, Book chapter, Mineral Deposits of Alaska (Economic Geology Monographs, volume 9)
Epithermal mineral deposits and occurrences of southwestern Alaska consist of Hg-Sb and gold- and sulfide-bearing vein lodes. Numerous Hg-Sb lodes are located throughout a region measuring several tens of thousands of square kilometers in and surrounding the Kuskokwim River basin in southwestern Alaska. The Hg-Sb lodes are hosted in sedimentary...
A comparison of six methods for measuring soil-surface carbon dioxide fluxes
J.M. Norman, C.J. Kucharik, S.T. Gower, D. D. Baldocchi, P.M. Crill, M. Rayment, K. Savage, Robert G. Striegl
1997, Journal of Geophysical Research D: Atmospheres (102) 28771-28777
Measurements of soil-surface CO2 fluxes are important for characterizing the carbon budget of boreal forests because these fluxes can be the second largest component of the budget. Several methods for measuring soil-surface CO2 fluxes are available: (1) closed-dynamic-chamber systems, (2) closed-static-chamber systems, (3) open-chamber systems, and (4) eddy covariance systems. This paper...
Unusual carbon and oxygen isotropic ratios of ostracodal calcite from last interglacial (Sangamon episode) lacustrine sediment in Raymond Basin, Illinois, USA
B. Brandon Curry, T.F. Anderson, K.C. Lohmann
1997, Journal of Paleolimnology (17) 421-435
The stable isotopic records of ostracode valves deposited during the last interglaciation in Raymond Basin, Illinois, have ??13C and ??18O values as high as +16.5??? and +9.2??? respectively, the highest values yet reported from continental ostracodal calcite. Located in south-central Illinois, Raymond, Pittsburgh, Bald Knob, and Hopwood Farm basins collectively...
Maps of the shallow shelf off the Florida Keys (subsurface bedrock topography, overlying reefs and sediments, benthic habitats)
Barbara H. Lidz
D. Gallagher, editor(s)
1997, Book chapter
No abstract available....
Detecting changes in the spatial distribution of nitrate contamination in ground water
Z.-J. Liu, G.R. Hallberg, D.L. Zimmerman, R.D. Libra
1997, Journal of the American Water Resources Association (33) 1209-1218
Many studies of ground water pollution in general and nitrate contamination in particular have often relied on a one-time investigation, tracking of individual wells, or aggregate summaries. Studies of changes in spatial distribution of contaminants over time are lacking. This paper presents a method to compare spatial distributions for possible...
Land cover mapping, fire regeneration, and scaling studies in the Canadian boreal forest with 1 km AVHRR and Landsat TM data
L. T. Steyaert, F.G. Hall, Thomas R. Loveland
1997, Journal of Geophysical Research D: Atmospheres (102) 29581-29598
A multitemporal 1 km advanced very high resolution radiometer (AVHRR) land cover analysis approach was used as the basis for regional land cover mapping, fire disturbance-regeneration, and multiresolution land cover scaling studies in the boreal forest ecosystem of central Canada. The land cover classification was developed by using regional field...
Physical processes affecting the sedimentary environments of Long Island Sound
R. P. Signell, H.J. Knebel, J. H. List, A.S. Farris
Spaulding M.L.Blumberg A.F., editor(s)
1997, Conference Paper, Proceedings of the International Conference on Estuarine and Coastal Modeling
A modeling study was undertaken to simulate the bottom tidal-, wave-, and wind-driven currents in Long Island Sound in order to provide a general physical oceanographic framework for understanding the characteristics and distribution of seafloor sedimentary environments. Tidal currents are important in the funnel-shaped eastern part of the Sound, where...
Headless submarine canyons and fluid flow on the toe of the Cascadia accretionary complex
D.L. Orange, B. G. McAdoo, J.C. Moore, H. Tobin, Elizabeth Screaton, H. Chezar, H. Lee, M. Reid, R. Vail
1997, Basin Research (9) 303-312
Headless submarine canyons with steep headwalls and shallowly sloping floors occur on both the second and third landward vergent anticlines on the toe of the Cascadia accretionary complex off central Oregon (45 °N, 125° 30′W). In September 1993, we carried out a series of nine deep tow camera sled runs and...
A comparison of sevoflurane and isoflurane for short-term anesthesia in polecats (Mustela eversmanni)
J. S. Gaynor, J. Wimsatt, C. Mallinckrodt, D. E. Biggins
1997, Journal of Zoo and Wildlife Medicine (28) 274-282
Twenty-four Siberian polecats (Mustela eversmanni) from 12 litters were anesthetized with either inhaled sevoflurane or isoflurane. With 7% delivered sevoflurane and 5% delivered isoflurane, time to loss of righting reflex (mean +/- SE) with sevoflurane (1.9 +/- 0.1 min) was significantly shorter compared with isoflurane (2.6 +/- 0.1 min). During...
Relationships among in-situ stress, fractures and faults, and fluid flow: Monterey formation, Santa Maria basin, California
T. Finkbeiner, C. A. Barton, Mark D. Zoback
1997, American Association of Petroleum Geologists Bulletin (81) 1975-1999
We used borehole televiewer (BHTV) data from four wells within the onshore and offshore Santa Maria basin, California, to investigate the relationships among fracture distribution, orientation, and variation with depth and in-situ stress. Our analysis of stress-induced well-bore breakouts shows a uniform northeast maximum horizontal stress (SH max) orientation in...
